asked the Minister of Supply whether he has investigated possible economies in operating the Fog Investigation Dispersal Operations system, for example, by only lighting the up-wind row of burners and by progressively cutting out alternate burners once fog clearance has been achieved.

It is a standard technique to light only one row of burners when there is a cross-wind. We hope to reduce fuel consumption by perfecting a variable output burner, which is a better technical solution than cutting out alternate burners.